9135726973 has 4 divisors (see below), whose sum is σ = 9151560700. Its totient is φ = 9119893248.

The previous prime is 9135726967. The next prime is 9135727049. The reversal of 9135726973 is 3796275319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3796275319 = 14411 ⋅263429.

It can be written as a sum of positive squares in 2 ways, for example, as 5134152409 + 4001574564 = 71653^2 + 63258^2 .

It is a cyclic number.

It is not a de Polignac number, because 9135726973 - 2¹⁷ = 9135595901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9135726973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9135726673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7915998 + ... + 7917151.

It is an arithmetic number, because the mean of its divisors is an integer number (2287890175).

Almost surely, 2^9135726973 is an apocalyptic number.

It is an amenable number.

9135726973 is a deficient number, since it is larger than the sum of its proper divisors (15833727).

9135726973 is a wasteful number, since it uses less digits than its factorization.

9135726973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15833726.

The product of its digits is 2143260, while the sum is 52.

The square root of 9135726973 is about 95580.9969240748. The cubic root of 9135726973 is about 2090.4881206156.

The spelling of 9135726973 in words is "nine billion, one hundred thirty-five million, seven hundred twenty-six thousand, nine hundred seventy-three".